Abstract
Background: Evidence from longitudinal studies points to the syndromic continuum of dementia. Individuals with mild cognitive impairment (MCI) are at increased risk of progressing to dementia over time, as well as older adults with subjective cognitive decline (SCD). Objective: To assess the impact of treating reversible causes of dementia on the outcome of patients with cognitive decline. Methods: Data were collected between 2017 and 2020 (mean follow-up = 44.52 ±6.85 months) in primary health care in Patos de Minas, MG. Subjects were screened using the MMSE, Figure Memory Test, Verbal Fluency, Clock Drawing Test, Geriatric Depression Scale, Geriatric Anxiety Inventory, and the Functional Activities Questionnaire. Results: Of 15 patients with SCD, 26.7% progressed to MCI. Of 45 patients with MCI, 13.4% progressed to dementia, 4.4% died and 26.7% regressed to SCD. Of 31 individuals with dementia, 6.5% regressed to SCD, 22.6% regressed to MCI and 19.4% died. Clinical improvement can be explained by the treatment of reversible causes, such as hypothyroidism, hypovitaminosis B12, and mood and anxiety disorders. Conclusion: Two-thirds of people who meet the criteria for MCI do not convert to dementia during the follow-up. These results reinforce the need of adequate screening and treatment of reversible causes of dementia in the primary care.
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